Evolution of Nokia phones from 1984 to today

In 1987, Nokia introduced one of the world's first handheld phones, the Mobira Cityman 900 for NMT-900 networks (which, compared to NMT-450, offered a better signal, yet a shorter roam). On September, 2 2013, Microsoft announced that it would acquire Nokia's mobile phone business unit as part of an overall deal totaling €5.44 billion (US$7.17 billion).
Nokia's mobile phones got a big publicity boost in 1987, when Soviet leader Mikhail Gorbachev was pictured using a Mobira Cityman to make a call from Helsinki to his communications minister in Moscow. This led to the phone's nickname of the "Gorba".

In 1988, Jorma Nieminen, resigning from the post of CEO of the mobile phone unit, along with two other employees from the unit, started a notable mobile phone company of their own, Benefon Oy (since renamed to GeoSentric). One year later, Nokia-Mobira Oy became Nokia Mobile Phones.